Telephone-line vibrator



H. W. LADD. TELEPHONE LINE VIBRATOR.

Patented Feb. 25, "1890.

- l V/ITNEEEEE- UNITED STATES PATENT OFFICE.

I'IERMON \V. LADD, OF BOSTON, MASSACHUSETTS.

TELEPHONE-LINE VIBRATOR.

SPECIFICATION forming part of Letters Patent No. 422,082, dated February 25, 1890.

Application filed June 12, 1889. Serial No. 314,064. (No model.)

My invention consists in a telephone-line having, distinct from the instruments, suitable spring-vibrators, and it is embodied in its best form in a re-enforcing chamber connected to the line-wire outside of the trans mitting instrument and provided with one or more inclosed vibrators which co -operate with and give continuity to the vibratory currents traversing the line-wire. The vibrators may be attached to the line-wire at will, or to the walls of the chamber, or to the line-wire within the chamber, or to a core concentric with it, and the core or chamber may constitute a section of the line or a support or hanger at a terminus of or bend in the line.

Vibrators have heretofore been employed within the chambers of telephonic instruments to give continuityto the longitudinal vibrations of the line wire but I am not aware of any such vibrators distinct from the instruments and intermediate between them prior to my invention.

In the drawings, Figure l is a longitudinal section, and Fig. 2 a cross-section, of a shell and core mounted on a line-wire with a series of vibrators attached to the core. Fig. 3 illustrates split and slotted cores for con venient application of vibrators to existing lines. Fig. 4 shows the core as a section of the line, and Fig. 5 a shell without inclosed core. Figs. 6 and 7 are side views of the line and hangers. Fig. 8 represents part of the line with free vibrators thereon.

A represents the line-wire, B the chamber mounted thereon, and G the vibrators inclosed in the chamber, so as to be free from the action of storms and wind.

D is a wooden or other core, which I pre fer to employ, surrounding the wire A, or

constituting a section of the length of the line.

The vibrators are preferably spiral springs of various sizes, each having one free end, and affixed at its other end either to the core D or wire A, so as to extend radially there from, or to the interior of the chamber D, to project inwardly toward the wire. Fig. 5 illustrates both these forms, the other figures showing a projection outwardly. These reenforcing devices are to be applied at intervals along the line or at supportingpoints, as in Figs. 6, 7, and 8.

In applying to existing lines the vibrators C may be attached at desired points, as in Fig. 8, or the line-wire A may be cut and passed through the cylinder and solid core, as in Figs. 1 and 2, or secured to each end of the chamber or core, as in Fig. 4, or the parts may be slotted or made in halves, as indicated in Fig. 3, to be brought together to embrace the unbroken wire.

The vibrators may be advantageously employed, as in Fig. 6, radiating from the spool or core D, which forms part of the hanger, the 1ine-vibrations being thus re'enforced instead of being weakened at these supportingpoints.

In Fig. 7 the vibrators are inclosed in the shell B.

I claim as my invention-- 1. The combination, with a properly-sup ported telephone line-wire, of suitable springvibrators connected thereto distinct from the instrument, substantially as set forth.

2. The combination, with a properly-supported telephone line-wire, of spring-vibrators mounted on said line and extending outwardly therefrom at points intermediate between the instruments, substantially as set forth.

3. A telephone line-wire provided with a series of spring vibrators at intermediate points, in combination with a core or body In testimony whereof I have signed my to which said vibrators are secn1ed,substanname to this specification, in the presence of 10 tially as set forth. two subscribing Witnesses, on this 5th day of 4. A telephone line-wire provided with a June, A. D. 1889.

5 series of spring-vibrators independent of and HERMON' \V. LADD.

external to the instruments, in combination \Vitnesses: with a chamber or shell inclosing such vi- A. H. SPENCER, blattOlS, substantially as set forth. JAMES P. PRINCE. 

